i ran a set of 38" radials and then a set of 40" bias plys. keep in mind this was before the outcropping of all the comp tires, etc. about the only other thing to choose from in those sizes was swampers.
for what i payed for them, they did well. i drove all over the eastern part of the country with them and 4 wheeled a lot of different places. they are tough tires, but as has been said the don't grip rocks very well. with the bias 40's, to say they were stiff is an understatement. it took running 0lbs. in the rear and 2lbs. in the front the get them to flex any. even after i broke them in i could run 4 front/2 rear. this is on a mostly full bodied heavy ass dodge ram.
they did wear like iron for an offroad tire. my 38's lasted something like 40k miles, and the 40's i had for about 10k and were barely worn when i sold them.
bottom line, if i was on a budget and needed an agressive tire than wore good on the street i'd consider them again. there are MUCH better tires out there though.